Atomic Nucleus: The symbol for a certain isotope of polonium is Po. How many neutrons are there in the nucleus of this isotope?

A. 84
B. 130
C. 214
D. 298
E. 314


Answer: B

Physics & Space Science

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Determine the average kinetic energy per atom due to thermal vibrations in a solid at 1000 K. You can assume that the heat capacity at constant volume for the solid is equal to the classical limit of 3R for all temperatures, and that the material is at constant volume during heating. Express your answer in eV/atom.

What will be an ideal response?

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By what factor is the capacitance of a metal sphere multiplied if its volume is tripled?

1.3 2.31/3 3.1 4.3-1/3 5.13

Physics & Space Science

Radio astronomy can only be done from up in space, due to our ionosphere

Indicate whether the statement is true or false

Physics & Space Science

Consider the ratio of the surface area of a sphere to its volume. What happens to this ratio if the diameter of the sphere increases by a factor of 3?

A. Decreases by a factor of 9 B. Increases by a factor of 3 C. Decreases by a factor of 3 D. Increases by a factor of 9 E. Stays the same

Physics & Space Science